Dayal, K. (2010). How to be happy: Despite failures and frustrations. Read worthy.
शिकागो स्टाइल उद्धरणDayal, Keshav. How to Be Happy: Despite Failures and Frustrations. New Delhi: Read worthy, 2010.
एमएलए उद्धरणDayal, Keshav. How to Be Happy: Despite Failures and Frustrations. Read worthy, 2010.
चेतावनी: ये उद्धरण हमेशा 100% सटीक नहीं हो सकते हैं.